Lock.



No. 800,024. PATENTED SEPT. 19, 1905. T. H. SPEIGELMIRE.

LOOK.

APPLICATION FILED we. 3, 1904.

vvi hue/0.4% fig 65262777170} 14% u; 6 I i flrmmt UNITED STATES PATENT OFFICE.

LOCK.

Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed August 3, 1904. $erial No. 219,381.

To all whom it may concern.-

Be it known that LTHoMAs H. SPEIGELMIRE, a citizen of the United States, residing at Munhall, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled'in the art to which it appertains to make and use the same.

This invention relates to looks in general, and more particularly to the class of doorlocks, the object of the invention being to provide a construction which will be cheap and simple of manufacture and which will dispense with the ordinary spring, other objects and advantages of the invention being understood from the following description.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a plan view showing the lock with the bolt in shot position. Fig. 2 is a detail perspective view of the yoke. Fig. 3 is a detail perspective view of the dog that operates the yoke. Fig. 4 is a section on line 4L 4 of Fig. 1.

Referring now to the drawings, the present lock comprises a casing 5, in which is slidably mounted abolt comprising a stem 6, having at one end a beveled head 7, which works in an opening 8 in the side of the casing, and hav ing at its opposite end an enlarged base 9. The stem 6 works between guides 10, which in connection with the sides of the opening 8 hold the bolt in proper operative position. To hold the bolt normally projected, a T- shaped lever is provided comprising a head 11 and a stem 12, the fulcrum of the lever consisting of a screw 13, passed through the head at one side of the stem 12, and which screw may serve also to hold the cover of the casing in place. It will be noted that the stem 12 is nearer to one end of the head 11 than to the other and that the screw or fulcrum 13 is substantially midway between the ends of the head. The lower end of the head 11 engages in a notch 14 in the upper face of the base 9, so that when the, lever is rocked on its fulcrum or pivot the bolt is reciprocated. It will be noted that it is one of the vertical faces of the head 7 that is beveled and, furthermore, that both the upper and lower faces of the base 9 are notched, so that the bolt may be reversed so that the beveled face will be at either side of the lock.

. To hold the T-lever with the bolt normally projected, the outer end of the stem 12 thereof is pivotally engaged with the upper end of a weight 15, which by pulling down on the stem of the lever throws the lower end of the head laterally to project the head 7 through the opening 8, the projection being limited by a guide 10, that serves as a stop.

To swing the head 11 and withdraw the bolt, a yoke-plate 17 is provided which is broader at one end than at the other and which broadened end is turned upwardly to form a flange 18, projecting at right angles to the face of the plate 17. An oval-shaped lever is pivoted at its major end to the minor end of the yokeplate 17, and the tapered end portion of this oval-shaped plate (shown at 19) is disposed to rest normally against the adjacent beveled face 20 of the upwardly-extending end portion of the head 11 of the T-shaped lever. The lever 19 is fulcrumed upon a pivot 21, so that when the plate 17 is moved longitudinally in one direction the minor end of the lever 19 presses against the beveled face 20 and swings the T-shaped lever, so that the free end of its stem portion 12 is raised to raise the weight 7, and at the same time the lower end ofthe head of theT-shaped lever is swung rearwardly to retract the bolt. When the yokeplate 17 is released, the weight 7 serves to draw the attached end of the stem 12 downwardly and to swing the head 11 to project the bolt.

To actuate the yoke-plate 17, a cam 23 is provided having the fingers 24 and 25, which rest against the flange 18, the cam having a central angular opening 26, which receives the usual knob-spindle. When the cam is turned in one direction, one finger engages the flange 18, and when the cam is turned in the opposite direction the other finger engages the flange, so that the bolt may be withdrawn by turning the knob in either direction.

To look the bolt in projected position, a locking-tumbler is provided consisting of a body portion 27, which is rotatably mounted in the casing by engagement in the lower end of the tumbler of curved and concentric flanges 28 and 29 upon the bottom of the casing. The tumbler 27 hasa radiating finger 30, and when the tumbler is in one position it rests against the end of the base 9 and upon the stop 31 and holds the bolt against rearward movement. When the tumbler is rotated to move its finger to inoperative position, the latter rests upon a stop upon the inner face of one end of the casing.

To oscillate the tumbler, a key may be provided which is introduced through the usual keyhole 32 in the casing. Through the central portion of the tumbler is a semicircular opening 34, into which the key enters, the stem of the key lying in the recess 35 on the fiat inner face 36 of the tumbler while the wing of the key is free to move in the semicircular opening to lie against the flat Wall 36, either above or below the recess 35, pressure of the wing of the key against the upper portion of the wall serving to swing the tumbler out of active position, while pressure against the lower portion of the wall serves to swing the tumbler into active position.

It will be understood that in practice modifications of the specific construction shown may be made and any suitable material and proportions may be used for the various parts without departing from the spirit of the ingaged through the head thereof and disposed with its head normally in vertical position with its lower end engaged with the bolt and with the stem of the lever extending rearwardly beyond the bolt, a weight pivoted to the extremity of the stem and adapted to hold the lever normally with the bolt projected, a second pivoted lever disposed to engage the upper end of the head of the T-shapcd lever and lock said lever in one direction a yokeplate pivoted to the second lover, a knobspindle, means carried by the knob-spindle for engagement with the yoke-plate to shift the latter to retract the bolt when the spindle is rotated in either direction, and a lockingtumbler movable into and out of position against the inner end of the bolt, and a lockcasing between which and the locking-tumbler the weight is slidably held. 7

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS H. SPEIGELMIRE.

WVitnesses:

JAMES L. De Lone, PETER RoU'rI-I. 

